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密肋壁板轻框结构受力性能分析及计算方法研究
【作者】 赵冬；
【作者基本信息】 西安建筑科技大学 ， 结构工程， 2001， 博士
【摘要】 减轻建筑物自重，提高对地震的防彻能力，增强保温节能效果，简化施工方法是当今建筑结构的发展趋势。本文就密肋壁板轻框结构这一新型结构形式的受力机理、抗震性能及设计计算方法进行了研究，主要完成以下工作： 首先以密肋复合墙板的试验为基础，分析了框格区划、截面配筋，填充块体强度、开洞等对墙板承载力、刚度、变形、破坏形态影响，探讨墙板框格与砌块协同工作与受力机理，提出了密肋复合墙板刚度及承载力实用计算公式。 对与密肋复合墙板，考虑砌块的开裂、屈服变化过程及砌块开裂后的应力释放，根据钢筋混凝土杆件在轴向力和弯矩共同作用下的开裂、屈服和弹塑性区域的变化过程，建立弹塑性有限元分析模型，提出了密肋复合墙板框格与砌块的优化配比设计的概念以及计算分析方法。 对10层密肋壁板轻框结构的l/3比例房屋模型进行拟动力试验研究，对结构的动力特性、地震反应及结构破坏特征进行了分析研究，给出了该结构体系的骨架曲线及恢复力模型，并对结构体系变形特性、耗能能力及抗倒塌能力进行探讨，试验表明，该结构受力性能介于框架与剪力墙结构之间。 在试验研究的基础上，对隐型轻框与密肋复合墙板的协同工作进行了探讨，提出了等效轴向刚度的概念并建立了便于实用计算分析的刚架-斜压杆简化计算模型。在此基础上对试验模型进行了计算分析；根据密肋壁板轻框结构构造及受力特点建立了适合该结构体系的框架-平面复合子结构有限元计算模型，并编制了结构空间有限元分析程序，计算分析表明，与试验结果吻合较好。 最后采用该方法对工程实例进行了大量分析计算，对结构在竖向荷载及水平地震作用下的受力性能及变形特性进行分析，给出了结构各主要构件（外框架、墙板框格梁柱及填充砌块）的内力分布规律，提出了结构设计计算方法及建议。
【Abstract】 It has been a trend for developmen of modern structure to diminish sole weight of abuilding, promote its antiseismic capacity, enhance its heat preservation and energy-savingeffect, and simplify the construction method. In this paper, load carrying mechanism,antiseisimic capacity, and design and calculation procedure of a new type of structure, lightweight frame structure of multi-ribbed wall panel, are studied with chief achievements asfollows:Firstly, effect of frame grids division, intersection reinforcement, strength of infill blocks,and portals on bearing capacity, stiffness, deformation, and failure characteristic is analyzed,and the cooperative behavior and load carrying mechanism of the wall panel’s frame gridsand infill masonry blocks are studied with a practical mathematical formulation of stiffnessand bearing capacity of the multi-ribbed composite wall panel proposed on the basis of aserial of tests of multi-ribbed composite wall panel.In accordance with opening, yielding, and changing process of elast-plastic area under theeffect of both axial force and bending moment, the reinforced concrete member is dividedinto five areas along the length of it; the member’s flexural stiffness in each area isconsidered to change linearly, and the element’s stiffness matrix is formed by means ofsubsectional integration. Fiuite element model of infill masonry blocks is formed accordingto homogeneous plane structure, allowing for openings in the blocks, yielding process andrelease of stress after the block opens. And finite e1ement analysis of the wall panel iscarried out in terms of cooperation between the frame grids and the infill masonry blocks.A ten-story building model of light weight frame structure of multi-ribbed wail panel withratio 1:3 is studied through the pseudo-dynamic test. Dynamic behavior, earthquake responseand failure characteristic of the structure are analyed with the strength envelop andhysteretic mode proposed, and deformation characteristic, energy-consuming, andcollapse-resisting capacity are also studied. As what is shown in the test results, thisstructure’s load carrying characteristic is between that of frame structure and shear wallstructure.Based on tests and research, cooperation of the hidden light weight frame and themulti-ribbed wall panel is studied with the concept of equal axial stiffness proposed and asimplified equivalent rigid frame-compressive diagonal strut model formed for practicalanalysis and calculation. On the basis of the above study, test models are calcuated andanalyzed; Frame-plane compound substructure computational finite element model that fitsthe structure system is proposed in terms of load carrying characteristic and texture of lightweight frame structure of multi-ribbed wall panel, and a space finite element program isworted out with -- rewt be tri out to coincme weu wt the test ~.Me. by utiltw ds W a gred ded Of ~is and talculedon Of the ealstingboons is ed Out and bo tw behavior and defOnnallon charWedc ofStrUAn under tw load and hOriZOthe wtc M are StUded. Ruls of inwtW MH Of M wt, boe pe of the tal Panat and the am maSOnybfock are gim DeSbo and COInwt method of the struan are ProPosed togtwwith som SUggestions.